CN102023381A - Scanning exposure device and image-forming apparatus - Google Patents
Scanning exposure device and image-forming apparatus Download PDFInfo
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- CN102023381A CN102023381A CN2010102828193A CN201010282819A CN102023381A CN 102023381 A CN102023381 A CN 102023381A CN 2010102828193 A CN2010102828193 A CN 2010102828193A CN 201010282819 A CN201010282819 A CN 201010282819A CN 102023381 A CN102023381 A CN 102023381A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
- G03G15/04036—Details of illuminating systems, e.g. lamps, reflectors
- G03G15/04045—Details of illuminating systems, e.g. lamps, reflectors for exposing image information provided otherwise than by directly projecting the original image onto the photoconductive recording material, e.g. digital copiers
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Abstract
A scanning exposure device includes: a reflecting member that reflects a light irradiated by an irradiating unit; a housing that has a bottom, a first sidewall, a second sidewall, and an aperture opening in a direction of a light reflected by the reflecting member; a cover that covers the aperture, forms a passing portion that allows the light reflected by the reflecting member to pass through, and provides a first fixed position at which the housing is fixed on the first sidewall and a second fixed position, paired with the first fixed position, at which the housing is fixed on the second sidewall, wherein the first fixed position and the second fixed position are arranged such that the main scanning direction passes between them.
Description
Technical field
The present invention relates to scanning-exposure apparatus and image processing system.
Background technology
The lid that the scanning-exposure apparatus of image processing system can have shell and be fixed in shell.This shell and lid may expand because be heated and be out of shape.JP-A-2002-148543 discloses by lid and shell fastening being offset because the technology of the power of the distortion that thermal expansion causes.JP-A-2005-156781 discloses following technology: by having two pairs or more scanning-exposure apparatus to the scan exposure unit in a part of fastening of the shell of about center of a plurality of scan exposures unit and optics box, lid and image processing system, prevent the distortion (for example crooked and distortion) of the optics box that causes owing to the thermal dilation difference between the parts, to reduce the deflection and the inclination of sweep trace.
Summary of the invention
The objective of the invention is to, in the rigidity of the shell that keeps the scan exposure dress,, prevented the light distortion that the thermal deformation owing to its shell causes by layout to the fixed position of shell and lid.
A first aspect of the present invention provides a kind of scanning-exposure apparatus, and this scanning-exposure apparatus comprises: reflection part, and it has the width that extends to the second end on main scanning direction from first end, with the light of reflection by the illumination unit irradiation; Shell, this shell has the bottom, described first end was fixed in, and the first side wall, described the second end were fixed in and in the face of second sidewall of described the first side wall and the opening that relatively is provided with described bottom, this opening is along the direction of light opening of described reflection part reflection; With the lid that covers described opening, described lid forms the part of passing through that the light that allows by described reflection part reflection passes through, and provide first fixed position and second fixed position paired with described first fixed position, described lid is fixed on the described the first side wall in described first fixed position, described lid is fixed on described second sidewall in described second fixed position, wherein, described first fixed position and described second fixed position are provided so that described main scanning direction passes between them.
A second aspect of the present invention provides the scanning-exposure apparatus according to first aspect, and is wherein, described by partly between described first fixed position and described second fixed position.
A third aspect of the present invention provides the scanning-exposure apparatus according to first aspect, wherein, paired described first fixed position and described second fixed position are based at least one in the following content and determine: position and the described the first side wall or the height of described second sidewall from described bottom to described opening of the 3rd sidewall of position, described first side of supporting and described second side of position, described first end and described the second end that produces the heat-generating units of heat.
A fourth aspect of the present invention provides the scanning-exposure apparatus according to second aspect, wherein, paired described first fixed position and described second fixed position are based at least one in the following content and determine: position and the described the first side wall or the height of described second sidewall from described bottom to described opening of the 3rd sidewall of position, described first side of supporting and described second side of position, described first end and described the second end that produces the heat-generating units of heat.
A fifth aspect of the present invention provides the scanning-exposure apparatus according to first aspect, and wherein, described shell and described lid are fixed in described first fixed position and described second fixed position by securing member.
A sixth aspect of the present invention provides the scanning-exposure apparatus according to second aspect, and wherein, described shell and described lid are fixed in described first fixed position and described second fixed position by securing member.
A seventh aspect of the present invention provides the scanning-exposure apparatus according to the third aspect, and wherein, described shell and described lid are fixed in described first fixed position and described second fixed position by securing member.
A eighth aspect of the present invention provides the scanning-exposure apparatus according to first aspect, wherein, the described first end of described reflection part can be supported in preset range movably by described the first side wall, and the described the second end of described reflection part can be supported in preset range movably by described second sidewall.
A ninth aspect of the present invention provides the scanning-exposure apparatus according to second aspect, wherein, the described first end of described reflection part can be supported in preset range movably by described the first side wall, and the described the second end of described reflection part can be supported in preset range movably by described second sidewall.
A tenth aspect of the present invention provides the scanning-exposure apparatus according to the third aspect, wherein, the described first end of described reflection part can be supported in preset range movably by described the first side wall, and the described the second end of described reflection part can be supported in preset range movably by described second sidewall.
A eleventh aspect of the present invention provides the scanning-exposure apparatus according to the 5th aspect, wherein, the described first end of described reflection part can be supported in preset range movably by described the first side wall, and the described the second end of described reflection part can be supported in preset range movably by described second sidewall.
A twelveth aspect of the present invention provides the scanning-exposure apparatus according to first aspect, and wherein, described lid is formed by the material with different linear expansion coefficients with described shell.
A thirteenth aspect of the present invention provides the scanning-exposure apparatus according to second aspect, and wherein, described lid is formed by the material with different linear expansion coefficients with described shell.
A fourteenth aspect of the present invention provides the scanning-exposure apparatus according to the third aspect, and wherein, described lid is formed by the material with different linear expansion coefficients with described shell.
A fifteenth aspect of the present invention provides the scanning-exposure apparatus according to the 5th aspect, and wherein, described lid is formed by the material with different linear expansion coefficients with described shell.
A sixteenth aspect of the present invention provides the scanning-exposure apparatus according to eight aspect, and wherein, described lid is formed by the material with different linear expansion coefficients with described shell.
A seventeenth aspect of the present invention provides a kind of image processing system, this image processing system comprises: scanning-exposure apparatus, this scanning-exposure apparatus comprises: reflection part, it has the width that extends to the second end on main scanning direction from first end, with the light of reflection by the illumination unit irradiation; Shell, this shell has the bottom, described first end was fixed in, and the first side wall, described the second end were fixed in and in the face of second sidewall of described the first side wall and the opening that relatively is provided with described bottom, this opening is along the direction of light opening of described reflection part reflection; With the lid that covers described opening, described lid forms the part of passing through that the light that allows by described reflection part reflection passes through, and provide first fixed position and second fixed position paired with described first fixed position, described lid is fixed on the described the first side wall in described first fixed position, and described lid is fixed on described second sidewall in described second fixed position; And image formation unit, it forms image based on the light from described scanning-exposure apparatus irradiation, and wherein, described first fixed position and described second fixed position are provided so that described main scanning direction passes between them.
According to a first aspect of the invention, in the rigidity of the shell that keeps the scan exposure dress,, prevented the light distortion that the thermal deformation owing to its shell causes by layout to the fixed position of shell and lid.
According to a second aspect of the invention, with a pair of fixed position not comparing by the situation of both sides of part, prevented the distortion of lid on the direction between first fixed position and second fixed position.
According to a third aspect of the invention we with fourth aspect in each, consider that the easy degree of casing deformation is determined the fixed position.
According to a fifth aspect of the invention, in the 6th aspect and the 7th aspect each, and by being not that the means of the securing member situation that fixes shell and lid is compared, can keep the rigidity of shell.
According to an eighth aspect of the invention, each on the one hand of the 9th aspect, the tenth aspect and the tenth, can adjust the path of the light that reflects by reflection part.
In the 13 aspect, the 14 aspect, the 15 aspect and the 16 aspect each according to a twelfth aspect of the invention,, compare by the situation that the material with identical linear expansion coefficient forms with lid with shell, prevented the light distortion that the shell temperature distortion owing to scanning-exposure apparatus causes.
According to a seventeenth aspect of the invention, by layout, prevented the light distortion that the distortion owing to the shell of scanning-exposure apparatus causes to the fixed position of shell and lid.
Description of drawings
To describe illustrative embodiments of the present invention in detail based on the following drawings now, in the accompanying drawings:
Fig. 1 is the synoptic diagram according to the image processing system of illustrative embodiments;
Fig. 2 is the synoptic diagram of the shell of scanning-exposure apparatus;
Fig. 3 is the orthograph of scanning-exposure apparatus;
Fig. 4 is the cut-away view of scanning-exposure apparatus;
Fig. 5 is the figure of reflection part;
Fig. 6 is the figure of another scanning-exposure apparatus of illustrating in order to compare with scanning-exposure apparatus;
Fig. 7 A and Fig. 7 B are the figure of situation that describes the distortion of scanning-exposure apparatus;
Fig. 8 is the figure with linear expansion lid of six fixed positions;
Fig. 9 is the figure that changes the time of the sweep length variation in the expression scanning-exposure apparatus;
Figure 10 is the figure according to the linear expansion lid of the scanning-exposure apparatus of illustrative embodiments;
Figure 11 is the figure that changes the time of the sweep length variation in the expression scanning-exposure apparatus;
Figure 12 A is figure according to the scanning-exposure apparatus of modification to Figure 12 D.
Embodiment
Fig. 1 is the synoptic diagram of image processing system according to an illustrative embodiment of the invention.Image processing system 1 comprises scanning-exposure apparatus 10, developing apparatus 20, transfer printing unit 30, stacker 40, delivery unit 50 and fixation unit 60.In the exemplary embodiment, scanning-exposure apparatus 10, developing apparatus 20, transfer printing unit 30, stacker 40, delivery unit 50 and fixation unit 60 are cooperated each other and are served as according to image formation unit of the present invention.Developing apparatus 20 comprises developing cell 21Y, 21M, 21C and 21K.Developing cell 21Y, 21M, 21C and 21K form the toner image of respective color (yellow (Y), magenta (M), cyan (C) and black (K)) respectively.Developing cell 21Y, 21M, 21C and 21K are provided with like this: developing cell 21Y is positioned at the extreme higher position, and developing cell 21K is positioned at extreme lower position.In other words, developing cell 21Y is positioned at the relative higher position than developing cell 21K.Developing cell 21Y, 21M, 21C and 21K comprise photosensitive drums 22Y, 22M, 22C and 22K (below, in the time need not distinguishing, with its photosensitive drums 22 of respectively calling oneself) respectively between these photosensitive drums.Scanning-exposure apparatus 10 exposes to photosensitive drums 22 in response to picture signal.
For convenience of explanation, below, the direction from the top of image processing system 1 to stacker 40 is defined as downward direction, and will be from stacker 40 to scanning-exposure apparatus 10 and developing apparatus 20 each direction be defined as upward to.
Scanning-exposure apparatus 10 comprises shell 11 and lid 12.Scanning-exposure apparatus 10 is between developing apparatus 20 and stacker 40.Scanning-exposure apparatus 10 comprises and being used for to the light channeling conduct and to the luminous parts of photosensitive drums 22.Scanning-exposure apparatus 10 utilizes the reflection part that describes below, reflection and direct light.Shell 11 is formed by the material of for example plastics, and holds parts and the reflection part that is used for the light channeling conduct.Shell 11 has the opening 13 in luminous direction upper shed.Lid 12 is formed by the material of for example plastics, and closes opening 13.
By scanning-exposure apparatus 10 exposure photosensitive drums 22, and on their surface, form sub-image.Developing apparatus 20 provides toner to photosensitive drums 22, on the surface of photosensitive drums 22 sub-image is developed and forms toner image.The toner image that is formed on the photosensitive drums 22 is transferred to the intermediate transfer belt 31 that is set to contact photosensitive drums 22.Secondary transfer roller 32 and backing roll 33 will be transferred to from the toner image that photosensitive drums 22 is transferred to intermediate transfer belt 31 on the recording medium 2 that is transmitted by delivery unit 50.By delivery unit 50 with transfer printing on it record images medium 2 be sent to fixation unit 60.
Fig. 2 is the synoptic diagram of the shell 11 of scanning-exposure apparatus 10.Arrow D1 represents the direction from developing cell 21Y to developing cell 21K along developing cell 21Y, the 21M, 21C and the 21K that are in line (it is arranged on the top of scanning-exposure apparatus 10) in Fig. 2.For convenience of explanation, will be defined as by the direction that arrow D1 represents forwards to, and will with forwards be defined as backward directions in the opposite direction.Shell 11 comprises antetheca 11a, rear wall 11b, right side wall 11c and left side wall 11d, and it forms opening 13.Antetheca 11a and rear wall 11b lay respectively at the front and back of opening 13.Right side wall 11c and left side wall 11d are positioned at the position that faces with each other.In the exemplary embodiment, one among right side wall 11c and the left side wall 11d corresponding to " the first side wall " according to the present invention, and another sidewall is corresponding to " second sidewall " according to the present invention.
Fig. 3 is the orthograph of scanning-exposure apparatus 10.Lid 12 has by part 121Y, 121M, 121C and 121K (in the time need not distinguishing between these are by part, below it is respectively called oneself by part 121).The light that allows to send from the inside of following scanning-exposure apparatus 10 by part 121 passes through.Each can have the structure that is equipped with transparent component (parts that for example are made of plastics) by part 121, perhaps can only be the bore portion that does not stop any parts that light passes through.Coupling part 113 is formed by the material of for example plastics, and is fixed in rear wall 11b.Coupling part 113 is connected to image processing system 1 by the securing member of for example screw and bolt.
Fixed position 122-1,122-2 and 122-3 (in the time need not distinguishing between these fixed positions, below with its fixed position 122 of respectively calling oneself) are the holes.At fixed position 122-1,122-2 and 122-3, fix shell 11 and lid 12 by for example comprising the screw of screw and nut or the securing member of fixed screw (not shown).Fixed position 122-1 and fixed position 122-3 are positioned at the left side wall 11d side on the lid 12.Fixed position 122-2 is positioned at the right side wall 11c side on the lid 12.Fixed position 122-1 and fixed position 122-2 are following location: make when the time from top observation scanning-exposure apparatus 10, by part 121M between these fixed parts.Fixed position 122-3 and fixed position 122-2 are following location: make when the time from top observation scanning-exposure apparatus 10, by part 121Y between these fixed parts.This two fixed positions that lay respectively at left side wall 11d and right side wall 11c side and have a certain positional relationship are called " paired fixed position ".In the exemplary embodiment, fixed position 122-1 and fixed position 122-2 can be paired, or alternatively, fixed position 122-3 and fixed position 122-2 can be paired.Yet one of fixed position 122-1 and fixed position 122-3 are not paired with fixed position 122-2.One in the paired fixed position corresponding to " first fixed position " according to the present invention, and another is corresponding to " second fixed position " according to the present invention.Note, can shell 11 and lid 12 be fixed in fixed position 122 by a pair of part of for example counterpart (snap fit), each right part of this part is respectively formed in shell 11 and the lid 12 one, to be fitted to each other.
Fig. 4 is the figure of the inner structure of scanning-exposure apparatus.Illumination unit 101 comprises the light source that is used to shine corresponding to the light of Y, M, C and K color, and based on the image that will form to rotation polygon prism 102 irradiates lights.In the exemplary embodiment, the light source irradiation laser of illumination unit 101.Rotation polygon prism 102 has a plurality of catoptrical reflectings surface that are used for, and reflects incident lights to f θ lens 103 when the drive unit by unshowned for example motor rotates.F θ lens 103 have the torsion characteristic of proofreading and correct focal distance f based on incident angle θ.Move with constant angular velocity by rotation polygon prism 102 laser light reflected.F θ lens 103 have calibration of laser so that laser shines the function on the surface of photosensitive drums 22 with constant speed.Laser light reflected incides on the reflection part 104 via f θ lens 103.Reflection part 104 has for example reverberator of catoptron, and the reflection incident laser.
Notice that illumination unit 101 can be arranged on the outside of scanning-exposure apparatus 10.At this moment, shell 11 comprises the parts that permission is passed through by the light that rotates polygon prism 102 reflections.
Reflected light is reflected parts 105, reflection part 106Y, 106M, 106C or 106K (in the time need not distinguishing between these reflection parts, below it is respectively called oneself " reflection part 106 ") in any and reflection part 107Y, 107M, 107C or 107K (in the time need between these reflection parts, not distinguishing, below it is respectively called oneself " reflection part 107 ") in any reflection, and be read out arbitrary by part 12.For example, reflection part 105 will arrive reflection part 106Y corresponding to the laser-bounce of Y.Reflection part 106Y reflects the laser light to reflection part 107Y.Reflection part 107Y reflects the laser light to by part 121Y.Laser passes by part 121Y, and the photosensitive drums 22Y of irradiation developing apparatus 20Y.Other laser of M, C and K color reflexes to corresponding reflection part 106 by reflection part 105.Pass through corresponding reflection part 107 reflector lasers then, and laser incides corresponding by part 121.
Fig. 5 is the figure that reflection part is shown.Fig. 5 illustrates reflection part 105, reflection part 106 and the reflection part 107 when observing scanning-exposure apparatus 10 from the top.The dotted line that length among Fig. 5 and two short delivery replace is represented fixed position 122.In addition, bottom 11e is by shadow representation, so that it and reflection part 105, reflection part 106 and reflection part 107 are distinguished in Fig. 5.Reflection part 105, reflection part 106 and reflection part 107 have for example reverberator of catoptron.Reflection part 105, reflection part 106 and reflection part 107 are supported to, and make that these ends can be towards right side wall 11c and left side wall 11d in preset range.Reflection part 105, reflection part 106 and reflection part 107 by changing the end the fixed position and mirror angle the two adjust the path of laser.Reflection part 105, reflection part 106 and reflection part 107, right side wall 11c and left side wall 11d have the mechanism of adjusting the position.In the exemplary embodiment, an end that is fixed to right side wall 11c or left side wall 11d is corresponding to " first end " according to the present invention, and another end is corresponding to " the second end " according to the present invention.The laser that rotation polygon prism 102 and f θ lens 103 are shone by illumination unit 101 along the direction from right side wall 11c to left side wall 11d (or opposite direction) reflection with constant speed.
Reflection part 105,106 and 107 has makes them can reflect along and the width of the laser that moves of direction left to the right.Reflection part 107 reflects the laser light to opening 13.Pass by part 121 by reflection part 107 laser light reflected, and irradiation photosensitive drums 22.Photosensitive drums 22 is provided with along reflection part 107.Operation based on the laser of the view data that will form irradiation photosensitive drums 22 when moving is called as " scanning ".In addition, the direction of scanning of laser is called as main scanning direction.In the exemplary embodiment, carry out scanning at main scanning direction D2 from right side wall 11c to left side wall 11d.Reflection part 105,106 and 107 is positioned as and makes the longitudinal direction of these parts along main scanning direction D2.
If shell 11 distortion then apply power to the end that is respectively fixed to right side wall 11c and left side wall 11d of reflection part 105,106 and 107.Reflection part 105,106 and 107 is based on the direction of applied force and have the distortion of for example deflection and distortion.When deforming, reflection part 105,106 and 107 changes the path of laser.If by carrying out scanning along the laser of the path movement that changes, then the position of image developing is offset.
Fig. 6 is for comparing the figure of another scanning-exposure apparatus 10p that illustrates with scanning-exposure apparatus 10.Except the fixed position, scanning-exposure apparatus 10p has the structure identical with scanning-exposure apparatus 10.On the lid 12p of scanning-exposure apparatus 10p, be provided with six fixed position 122p-1,122p-2,122p-3,122p-4,122p-5 and 122p-6.Fixed position 122p-1 is to be provided with like this with fixed position 122p-2: make to be connected the straight line parallel of these two fixed positions in main scanning direction D2.Below this relation of paired fixed position is called " parallel " relation.Fixed position 122p-3 and fixed position 122p-4 and fixed position 122p-5 and fixed position 122p-6 have parallel relation.
Fig. 7 A and Fig. 7 B are the figure that describes the distortion of scanning-exposure apparatus 10p.Fig. 7 A and Fig. 7 B illustrate the inside of scanning-exposure apparatus 10p from the front.In Fig. 7 A and Fig. 7 B,, only show reflection part 106C and 107C as internal part.Fixed position 122p-1 and 122p-2 lay respectively at left side wall 11d side and the right side wall 11c side on the lid 12p.Lid 12 and shell 11 are fixed in fixed position 122p-1 and 122p-2 by securing member.Lid 12 and the shell 11 of scanning-exposure apparatus 10p are formed by the material with heterogeneity.When lid 12 and shell 11 had heterogeneity, lid 12 had different linear expansion coefficients with shell 11.For example, suppose that lid 12 is formed by the material with linear expansion coefficient bigger than the linear expansion coefficient of shell 11.In this case, the lid 12p of linear expansion applies power towards shell 11 outsides to the end of right side wall 11c and left side wall 11d.
On the other hand, shell 11 applies power to lid 12p on the direction opposite with the power that is applied by lid 12p.These power are effect-reacting forces that lid 12 and shell 11 apply along main scanning direction D2 toward each other at fixed position 122p.Fixed position 122p-1 and fixed position 122p-2 are the paired fixed positions that is set to have parallel relation.Therefore, the directive effect that is compressed along lid 12 at fixed position 122p from shell 11 of reacting force is on lid 12.At this moment, the distortion situation of lid 12p and shell 11 is determined by the elasticity coefficient separately of lid 12p and shell 11.For example, the shell 11 of supposing scanning-exposure apparatus 10p is formed and makes in the rigidity of the main scanning direction bulk modulus (bulk modulus) less than lid 12p.In this case, shell 11 is because the power that lid 12p applies and deforming towards the outside of shell 11.
Fig. 7 A is the figure of the lid 12p before linear expansion.Fig. 7 B is the figure that has the shell 11 of deflection owing to the linear expansion of lid 12p.The right side wall 11c and the left side wall 11d of the shell 11 of deflection apply power to the end of reflection part 106C and 107C, make reflection part 106C and 107C each core towards lid 12p become the projection (making progress).Power causes reflection part 106C and 107C bending, makes these cores towards lid 12p projection.Laser is in first surface reflection of reflection part 107C, and moves to by part 121C.In other words, laser reflects on convex surface, and the width from the reference position to the end position of scanning enlarges thus.Below this width is called " sweep length ", and the length of this width is called as " variation of sweep length ".The variation of sweep length is subjected to the influence of easy degree of distortion of the end that is positioned at lid 12p side of right side wall 11c and left side wall 11d.More particularly, when on main scanning direction D2 when the end applies power, the variation of sweep length is the influence of rigidity and torsion rigidity (hereinafter referred to as " rigidity ") by bending.
Forward Fig. 4 now to, the left side wall 11d of scanning-exposure apparatus 10p has structure shown in Figure 4.At the power that applies on main scanning direction D2, left side wall 11d is subjected to antetheca 11a and rear wall 11b supporting.Therefore, the part of more close antetheca 11a on the left side wall 11d or rear wall 11b is subjected to very strong supporting to resist this power.In other words, in the distance the closer to antetheca 11a or rear wall 11b, the rigidity of left side wall 11d is bigger.In addition, the rigidity of left side wall 11d is bigger in its height lower.As mentioned above, left side wall 11d is higher in antetheca 11a side, and towards rear wall 11b side step-down.Therefore, the rigidity in the end that surrounds the lid 12p side of passing through the left side wall 11d in the part of part 121M is littler than the rigidity of other parts.
The level of the linear expansion of lid 12p also changes along with the heat that is applied to lid 12p.Scanning-exposure apparatus 10 comprises the parts of heating.For example, illumination unit 101 converts electrical energy into the light time heating at it.Rotation polygon prism 102 is owing to the driving of driver element is generated heat.Specifically, rotation polygon prism 102 produces the heat of maximum.Thereby, comparing with other parts, lid 12p is standing more substantial heat by part 121M with by the part between the part 121Y (this part is positioned at the top of rotation polygon prism 102 in vertical direction).Illumination unit 101 and rotation polygon prism 102 are separately corresponding to heat-generating units according to the present invention.
Fig. 8 is the figure of lid 12p of the linear expansion of scanning-exposure apparatus 10p.As mentioned above, effect-reacting force of applying each other along main scanning direction D2 at fixed position 122p of shell 11 and lid 12p.A pair of fixed position 122p-1 and fixed position 122p-2, a pair of fixed position 122p-3 and fixed position 122p-4 and a pair of fixed position 122p-5 and fixed position 122p-6 are provided so that each is to having parallel relation.Therefore, from shell 11 reacting force is applied to lid 12 in the direction that lid 12 is compressed at fixed position 122p.Supposing also that shell 11 is formed makes the rigidity of main scanning direction less than the bulk modulus of lid 12p.In this case, because lid 12p applied force, shell 11 deforms towards the outside of shell 11 in the paired fixed position with parallel relation.
As mentioned above, around by part 121M or by part 121M with around by the part between the part 121Y, the rigidity of the end that is positioned at lid 12p side of right side wall 11c and left side wall 11d is minimum.In addition, the relatively large heat of passing through part 121M and being subjected to by the part between the part 121Y producing on the lid 12p by rotation polygon prism 102.Therefore, on the lid 12p pass through part 121M and by the part between the part 121Y, right side wall 11c and left side wall 11d are because the amount increase that linear expansion is expanded.Because these influences are in scanning-exposure apparatus 10p, by part 121M and more than other fixed position distortion by the part between the part 121Y.Along with the position on lid 12p more near antetheca 11a or rear wall 11b, the amount of distortion reduces.Below, the experimental result of the measurement that the sweep length corresponding to the laser of Y, M, C and K color changes is described in scanning-exposure apparatus 10p.
Fig. 9 is the curve map that changes the time of the sweep length variation among the expression scanning-exposure apparatus 10p.Shown in this curve map, the sweep length of passing the laser by part 121C changes greater than passing other sweep length by each laser of part 121 and changes.Passing the sweep length of light by the laser of part 121K changes less than passing other sweep length by each laser of part 121 and changes.The fixed position and the sweep length that the following describes according to the lid 12 of the scanning-exposure apparatus 10 of this illustrative embodiments change.
Figure 10 is the figure according to the linear expansion lid 12 of the scanning-exposure apparatus 10 of illustrative embodiments.Dotted line among Figure 10 is represented the outer rim of shell 11.Paired fixed position 122 in the scanning-exposure apparatus 10 is provided so that the straight line that is connected and fixed the position intersects with main scanning direction D2.In other words, the paired fixed position 122 in the scanning-exposure apparatus 10 is provided so that main scanning direction D2 passes between them.In addition, fixed position 122 is provided so that by part 121 between the fixed position in pairs.As mentioned above, the lid 12p of shell 11 and linear expansion 122 applies effect-reacting force along main scanning direction D2 each other in the fixed position.Therefore, reacting force is along making the directive effect of lid 12 bendings on fixed position 122, and this direction is represented by the arrow of Figure 10.At this moment, the distortion of lid 12 and shell 11 is determined by lid 12 and shell 11 elasticity coefficient separately.For example, supposing that lid 12 is formed makes in the fixed position 122 for the rigidity of the main scanning direction rigidity less than shell 11.In this case, lid 12 is owing to the power that shell 11 applies is out of shape.Notice that for the power on the main scanning direction, the rigidity of the end of passing through part 121 part on every side that is formed by the plane with less width is less.When lid 12 distortion, by the part around the end of part 121 very big distortion takes place.The following describes the experimental result of the measurement of the sweep length variation in the scanning-exposure apparatus 10.
Figure 11 is the figure that changes the time of the sweep length variation in the expression scanning-exposure apparatus 10.Change with sweep length among the scanning-exposure apparatus 10p shown in Figure 9 and to compare, the sweep length of the laser of Y, C and M color changed became less after 20 minute.Specifically, the sweep length variation at the laser of color C after 20 minutes is minimum in the sweep length of the laser of these colors changes.On the contrary, the sweep length of the laser of color K changes with the situation shown in Fig. 9 almost equally after 20 minutes, be fixed in lower sidewall because be used to reflect the reflection part of this laser, and this reflection part is away from the part of heating.In addition, the maximal value of each sweep length variation of a plurality of colors in the scanning-exposure apparatus 10 and the difference between the minimum value are less than the situation among the scanning-exposure apparatus 10p.If difference is less, so, when the doubling of the image, the gap between the image of these colors reduces, and especially reduces in the both sides of main scanning direction.
As mentioned above, the lid 12 of scanning-exposure apparatus 10 prevents that shell 11 is owing to the power of the linear expansion of lid 12 is out of shape.In addition, when other power was applied to shell 11, lid 12 can help to keep the rigidity of shell 11.In this case, when the power that makes shell 11 be out of shape was delivered to lid 12 by fixed position 122, lid 12 utilized its elastic force to receive this power, thereby has prevented the distortion of shell 11.By this way, if the rigidity of shell 11 does not increase, lid 12 has prevented that shell 11 is owing to the power that applies from the outside distorts.
It more than is description to illustrative embodiments of the present invention; Yet, can various aspects as described below put into practice the present invention.
In above-mentioned illustrative embodiments, be provided with three fixed positions, but the fixed position of other quantity, for example two or four fixed positions also can be set.Under the situation that three fixed positions are set, these fixed positions can be arranged on the position different with the position in the illustrative embodiments.In this case, can be based on the position of heat-generating units, be used for the fixed position of the reflection part of reflector laser, distance and described fixed position at least one from the height of bottom 11e from antetheca 11a or rear wall 11b to described fixed position, determine each fixed position.
Figure 12 A is figure according to the scanning-exposure apparatus of modification to Figure 12 D.Except the fixed position, scanning- exposure apparatus 10a, 10b, 10c and 10d have the structure identical with scanning-exposure apparatus 10.Figure 12 A is the figure with scanning-exposure apparatus 10a of two fixed positions.In this case, if the fixed position 122a-1 on the lid 12a is provided so that with 122a-2 the direction of the straight line that is connected these two fixed positions and main scanning direction intersect, then fixed position 122a-1 on the lid 12a and 122a-2 can be positioned at other position.Figure 12 B is the figure with scanning-exposure apparatus 10b of three fixed positions.The setting of fixed position 122b-1,122b-2 and 122b-3 is different from the setting of the fixed position 122 of scanning-exposure apparatus 10.In this case, if the quantity of fixed position is identical, when the actual change in fixed position, sweep length changes and also can change, because when the fixed position changes, and the distance between fixed position and the heat-generating units and highly all changing.
Figure 12 C is the figure with scanning-exposure apparatus 10c of four fixed positions.On lid 12c, be provided with a pair of fixed position 122c-3 and 122c-4 and a pair of fixed position 122c-1 and 122c-2.The straight line that is connected and fixed position 122c-3 and 122c-4 intersects with main scanning direction D2.The straight line that is connected and fixed position 122c-1 and 122c-2 is parallel with main scanning direction D2.Shown in Figure 12 C, if be provided with at least one pair of fixed position with following relation: connect this straight line and intersect with main scanning direction D2 to the position, then can be provided with have parallel relation another to the fixed position.Figure 12 D is the figure with scanning-exposure apparatus 10d of two fixed positions.Shown in Figure 12 D, a pair of to have that the fixed position that connects this relation that straight line of position and main scanning direction D2 are intersected can be positioned at not be position by the both sides of part 121.
To the aforementioned description of exemplary embodiment of the invention for illustration and purpose of description and provide.It is not to be intended to exhaustive or to limit the invention to disclosed exact form.Obviously, many variants and modifications are conspicuous for those skilled in the art.Selecting and describing these illustrative embodiments is for principle of the present invention and practical application thereof are described best, thereby makes others skilled in the art can understand various embodiments and the various modification that is applicable to the special-purpose of conceiving of the present invention.Be intended to limit scope of the present invention by appended claims and equivalent thereof.
Claims (17)
1. scanning-exposure apparatus, this scanning-exposure apparatus comprises:
Reflection part, it has the width that extends to the second end on main scanning direction from first end, with the light of reflection by the illumination unit irradiation;
Shell, it has: the bottom; The first side wall, described first end is fixed to described the first side wall; In the face of second sidewall of described the first side wall, described the second end is fixed to described second sidewall; And the opening that relatively is provided with described bottom, this opening is along the direction of light opening by described reflection part reflection;
Lid, it covers described opening, described lid forms the part of passing through that the light that allows by described reflection part reflection passes through, and provide first following fixed position and second fixed position paired with described first fixed position: described lid is fixed on the described the first side wall in described first fixed position, described lid is fixed on described second sidewall in described second fixed position
Wherein, described first fixed position and described second fixed position are provided so that described main scanning direction passes between them.
2. scanning-exposure apparatus according to claim 1, wherein, described by partly between described first fixed position and described second fixed position.
3. scanning-exposure apparatus according to claim 1, wherein, paired described first fixed position and described second fixed position are based at least one the position of the 3rd sidewall of position, described first side of supporting and described second side of position, described first end and the described the second end of the heat-generating units that produces heat and described the first side wall or the height of described second sidewall from described bottom to described opening and determine.
4. scanning-exposure apparatus according to claim 2, wherein, paired described first fixed position and described second fixed position are based at least one the position of the 3rd sidewall of position, described first side of supporting and described second side of position, described first end and the described the second end of the heat-generating units that produces heat and described the first side wall or the height of described second sidewall from described bottom to described opening and determine.
5. scanning-exposure apparatus according to claim 1, wherein, described shell and described lid are fixed in described first fixed position and described second fixed position by securing member.
6. scanning-exposure apparatus according to claim 2, wherein, described shell and described lid are fixed in described first fixed position and described second fixed position by securing member.
7. scanning-exposure apparatus according to claim 3, wherein, described shell and described lid are fixed in described first fixed position and described second fixed position by securing member.
8. scanning-exposure apparatus according to claim 1, wherein, the described first end of described reflection part can be supported in preset range movably by described the first side wall, and the described the second end of described reflection part can be supported in preset range movably by described second sidewall.
9. scanning-exposure apparatus according to claim 2, wherein, the described first end of described reflection part can be supported in preset range movably by described the first side wall, and the described the second end of described reflection part can be supported in preset range movably by described second sidewall.
10. scanning-exposure apparatus according to claim 3, wherein, the described first end of described reflection part can be supported in preset range movably by described the first side wall, and the described the second end of described reflection part can be supported in preset range movably by described second sidewall.
11. scanning-exposure apparatus according to claim 5, wherein, the described first end of described reflection part can be supported in preset range movably by described the first side wall, and the described the second end of described reflection part can be supported in preset range movably by described second sidewall.
12. scanning-exposure apparatus according to claim 1, wherein, described lid is formed by the material with different linear expansion coefficients with described shell.
13. scanning-exposure apparatus according to claim 2, wherein, described lid is formed by the material with different linear expansion coefficients with described shell.
14. scanning-exposure apparatus according to claim 3, wherein, described lid is formed by the material with different linear expansion coefficients with described shell.
15. scanning-exposure apparatus according to claim 5, wherein, described lid is formed by the material with different linear expansion coefficients with described shell.
16. scanning-exposure apparatus according to claim 8, wherein, described lid is formed by the material with different linear expansion coefficients with described shell.
17. an image processing system, this image processing system comprises:
Scanning-exposure apparatus, this scanning-exposure apparatus comprises:
Reflection part, it has the width that extends to the second end on main scanning direction from first end, with the light of reflection by the illumination unit irradiation;
Shell, it has: the bottom; The first side wall, described first end is fixed to described the first side wall; In the face of second sidewall of described the first side wall, described the second end is fixed to described second sidewall; And the opening that relatively is provided with described bottom, this opening is along the direction of light opening by described reflection part reflection; And
Lid, it covers described opening, described lid forms the part of passing through that the light that allows by described reflection part reflection passes through, and provide first following fixed position and second fixed position paired with described first fixed position: described lid is fixed on the described the first side wall in described first fixed position, and described lid is fixed on described second sidewall in described second fixed position; And
Image formation unit, it forms image based on the light from described scanning-exposure apparatus irradiation,
Wherein, described first fixed position and described second fixed position are provided so that described main scanning direction passes between them.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009213588A JP2011064806A (en) | 2009-09-15 | 2009-09-15 | Optical scanning device and image forming device |
| JP2009-213588 | 2009-09-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102023381A true CN102023381A (en) | 2011-04-20 |
| CN102023381B CN102023381B (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010282819.3A Expired - Fee Related CN102023381B (en) | 2009-09-15 | 2010-09-14 | Scanning exposure device and image-forming apparatus |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US8681196B2 (en) |
| JP (1) | JP2011064806A (en) |
| CN (1) | CN102023381B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238337A (en) * | 2013-06-24 | 2014-12-24 | 佳能株式会社 | Cover member, light scanning apparatus, and image forming apparatus |
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| US20060285170A1 (en) * | 2005-06-15 | 2006-12-21 | Canon Kabushiki Kaisha | Optical unit and image forming apparatus |
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| CN100421033C (en) * | 2004-03-31 | 2008-09-24 | 兄弟工业株式会社 | Image forming apparatus and scanning unit |
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| JP4029560B2 (en) | 2000-11-09 | 2008-01-09 | 富士ゼロックス株式会社 | Optical scanning device |
| JP2004054019A (en) | 2002-07-22 | 2004-02-19 | Canon Inc | Scanning optical device and image forming apparatus |
| JP2005156781A (en) | 2003-11-25 | 2005-06-16 | Canon Inc | Scanning optical apparatus and color image forming apparatus using the same |
| JP2005292356A (en) * | 2004-03-31 | 2005-10-20 | Brother Ind Ltd | Image forming apparatus |
| CN100430830C (en) * | 2004-03-31 | 2008-11-05 | 兄弟工业株式会社 | Recording medium feeding device and imaging device |
| JP4124153B2 (en) * | 2004-03-31 | 2008-07-23 | ブラザー工業株式会社 | Process cartridge and image forming apparatus |
| JP2007203708A (en) * | 2006-02-06 | 2007-08-16 | Ricoh Co Ltd | Optical scanning apparatus and image formation apparatus |
| JP4760627B2 (en) * | 2006-09-06 | 2011-08-31 | 富士ゼロックス株式会社 | Optical scanning device |
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2010
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| CN100421033C (en) * | 2004-03-31 | 2008-09-24 | 兄弟工业株式会社 | Image forming apparatus and scanning unit |
| JP2006150687A (en) * | 2004-11-26 | 2006-06-15 | Ricoh Co Ltd | Optical writer and image forming apparatus |
| US20060285170A1 (en) * | 2005-06-15 | 2006-12-21 | Canon Kabushiki Kaisha | Optical unit and image forming apparatus |
| US20070216966A1 (en) * | 2006-03-09 | 2007-09-20 | Tomoya Ohsugi | Optical scanner and image forming apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104238337A (en) * | 2013-06-24 | 2014-12-24 | 佳能株式会社 | Cover member, light scanning apparatus, and image forming apparatus |
| CN104238337B (en) * | 2013-06-24 | 2018-12-07 | 佳能株式会社 | The lid component, optical scanning device and imaging device |
Also Published As
| Publication number | Publication date |
|---|---|
| US20110063591A1 (en) | 2011-03-17 |
| JP2011064806A (en) | 2011-03-31 |
| US8681196B2 (en) | 2014-03-25 |
| CN102023381B (en) | 2014-11-05 |
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